Debt - Parenthetical Information (Details)	0 Months Ended
	Mar. 15, 2013 Senior Convertible Notes	Nov. 22, 2013 Monoprice, Inc	Aug. 30, 2013 TaxACT 2013 credit facility
Debt Instrument [Line Items]
Frequency of Payment and Payment Terms		Monoprice has the right to permanently reduce, without premium or penalty, the entire credit facility at any time or portions of the credit facility in an aggregate principal amount not less than $1.0 million or any whole multiple of $1.0 million in excess thereof (for swingline loans, the aggregate principal amount is not less than $0.1 million and any whole multiple of $0.1 million in excess thereof).	TaxACT has the right to permanently reduce, without premium or penalty, the entire credit facility at any time or portions of the credit facility in an aggregate principal amount not less than $3.0 million or any whole multiple of $1.0 million in excess thereof.
Interest rate description		The interest rate on amounts borrowed under the credit facility is variable, based upon, at the election of Monoprice, either LIBOR plus a margin of between 2.75% and 3.25%, payable as of the end of each interest period, or a variable rate plus a margin of between 1.75% and 2.25%, payable quarterly in arrears. In each case, the applicable margin within the range depends upon Monoprice’s ratio of leverage to EBITDA over the previous four quarters.	The interest rate on amounts borrowed under the credit facility is variable, based upon, at the election of TaxACT, either LIBOR plus a margin of between 1.75% and 2.5%, or a Base Rate plus a margin of between 0.75% and 1.5%, and payable as of the end of each interest period. In each case, the applicable margin within the range depends upon TaxACT’s ratio of leverage to EBITDA over the previous four quarters.
Convertible, Terms of Conversion Feature	Beginning July 1, 2013 and prior to the close of business on September 28, 2018, holders may convert all or a portion of the Notes at their option, in multiples of $1,000 principal amount, under the following circumstances:During any fiscal quarter commencing July 1, 2013, if the last reported sale price of the Company’s common stock for at least 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day. Based on this, the Notes were convertible through March 31, 2014, but none were converted as of that date. As of March 31, 2014, the Notes were not convertible.During the five business day period after any five consecutive trading day period (the “measurement period”) in which the trading price per $1,000 principal amount of the Notes for each trading day of the measurement period was less than 98% of the product of the last reported sales price of the Company’s common stock and the conversion rate on each trading day.If the Company calls any or all of the Notes for redemption.Upon the occurrence of specified corporate events, including a merger or a sale of all or substantially all of the Company’s assets.
Redemption, Description	Beginning April 6, 2016, the Company may, at its option, redeem for cash all or part of the Notes plus accrued and unpaid interest. If the Company undergoes a fundamental change (as described in the Indenture), holders may require the Company to repurchase for cash all or part of their Notes in principal amounts of $1,000 or an integral multiple thereof. The fundamental change repurchase price will be equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid interest.